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ICASSP
2011
IEEE
8 years 10 months ago
Generalized interior-point method for constrained peak power minimization of OFDM signals
In this paper we present two results on reducing the peak power of orthogonal frequency division multiplexing (OFDM) symbols via constellation extension (CE). The first result is...
Zhenhua Yu, Robert J. Baxley, G. Tong Zhou
ICASSP
2011
IEEE
8 years 10 months ago
Audio signal classification with temporal envelopes
The conventional approach to audio processing, based on the short-time power spectrum model, is not adequate when it comes to general audio signals. We propose an approach, justi...
M. Umair Bin Altaf, Biing-Hwang Juang
ICASSP
2011
IEEE
8 years 10 months ago
Online performance guarantees for sparse recovery
A K∗ -sparse vector x∗ ∈ RN produces measurements via linear dimensionality reduction as u = Φx∗ + n, where Φ ∈ RM×N (M < N), and n ∈ RM consists of independent ...
Raja Giryes, Volkan Cevher
ICASSP
2011
IEEE
8 years 10 months ago
Using latent topic features to improve binary classification of spoken documents
In many topic identification applications, supervised training labels are indirectly related to the semantic content of the documents being classified. For example, many topical...
Jonathan Wintrode
ICASSP
2011
IEEE
8 years 10 months ago
Estimation of the frequency dependent reverberation time by means of warped filter-banks
An improved approach for the estimation of the frequency dependent reverberation time (RT) by means of allpass transformed filterbanks is presented. It is shown that by means of ...
Heinrich W. Löllmann, Peter Vary
ICASSP
2011
IEEE
8 years 10 months ago
Tonal context labeling using quantized F0 symbols for improving tone correctness in average-voice-based speech synthesis
This paper proposes a technique for improving tone correctness in Thai speech synthesis based on an average voice model trained with nonprofessional speech corpus. The proposed te...
Vataya Chunwijitra, Takashi Nose, Takao Kobayashi
ICASSP
2011
IEEE
8 years 10 months ago
Bayesian framework and message passing for joint support and signal recovery of approximately sparse signals
In this paper, we develop a low-complexity message passing algorithm for joint support and signal recovery of approximately sparse signals. The problem of recovery of strictly spa...
Shubha Shedthikere, Ananthanarayanan Chockalingam
ICASSP
2011
IEEE
8 years 10 months ago
Sensing-aware classification with high-dimensional data
In many applications decisions must be made about the state of an object based on indirect noisy observation of highdimensional data. An example is the determination of the presen...
Burkay Orten, Prakash Ishwar, W. Clem Karl, Venkat...
ICASSP
2011
IEEE
8 years 10 months ago
Maximum marginal likelihood estimation for nonnegative dictionary learning
We describe an alternative to standard nonnegative matrix factorisation (NMF) for nonnegative dictionary learning. NMF with the Kullback-Leibler divergence can be seen as maximisa...
Onur Dikmen, Cédric Févotte
ICASSP
2011
IEEE
8 years 10 months ago
Simultaneous dialog act segmentation and classification from human-human spoken conversations
An accurate identification dialog acts (DAs), which represent the illocutionary aspect of communication, is essential to support the understanding of human conversations. This re...
Silvia Quarteroni, Alexei V. Ivanov, Giuseppe Ricc...
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